fix(ResourceTagMapping): PRWLR-5271 set CASCADE for resource field (#80)

src/backend/api/migrations/0001_initial.py

@@ -794,7 +794,7 @@ class Migration(migrations.Migration):
                 (
                     "resource",
                     models.ForeignKey(
-                        on_delete=django.db.models.deletion.DO_NOTHING,
+                        on_delete=django.db.models.deletion.CASCADE,
                         to="api.resource",
                     ),
                 ),

src/backend/api/models.py

@@ -450,7 +450,7 @@ class ResourceTagMapping(RowLevelSecurityProtectedModel):
     # NOTE that we don't really need a primary key here,
     #      but everything is easier with django if we do
     id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
-    resource = models.ForeignKey(Resource, on_delete=models.DO_NOTHING)
+    resource = models.ForeignKey(Resource, on_delete=models.CASCADE)
     tag = models.ForeignKey(ResourceTag, on_delete=models.CASCADE)
 
     class Meta(RowLevelSecurityProtectedModel.Meta):